Sculpting the Philippine archipelago since the Cretaceous through rifting,oceanic spreading,subduction, obduction,collision and strike-slip faulting: Contribution to IGMA5000 |
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| Institution: | 1. National Institute of Geological Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines;2. Geological Society of the Philippines, Pasig City, Philippines;1. Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China;3. Department of Geophysics, Tohoku University, Sendai 980-8578, Japan;1. Rushurgent Working Group, National Institute of Geological Sciences, College of Science, University of the Philippines, Diliman, Quezon City, Philippines;2. Economic Geology Laboratory, Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan;3. School of Environmental Science and Management, University of the Philippines, Los Baños, Laguna, Philippines;4. Apex Mining Company, Inc., Ortigas Center, Pasig City, Metro Manila, Philippines;1. Rushurgent Working Group, National Institute of Geological Sciences, College of Science, University of the Philippines, Diliman, Quezon City, Philippines;2. Cordillera Exploration Company, Inc., BGC, Taguig City, Philippines;3. School of Environmental Science and Management, University of the Philippines, Los Baños, Laguna, Philippines;1. National Institute of Geological Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines;2. Department of Geology and Mineralogy, Graduate School of Science, Kyoto University, Kyoto, Japan;1. Graduate School of Engineering and Resource Sciences, Akita University, Japan;2. Department of Geology and Paleontology, National Museum of Nature and Science, Japan;3. Graduate School of International Resource Sciences, Akita University, Japan;1. Apex Mining Company Inc., Ortigas Center, Pasig City, Metro Manila, Philippines;2. Rushurgent Working Group, National Institute of Geological Sciences, College of Science, University of the Philippines, Diliman, Quezon City, Philippines;3. School of Environmental Science and Management, University of the Philippines, Los Baños, Laguna, Philippines |
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| Abstract: | The Philippine archipelago resulted from a complex series of geologic events that involved continental rifting, oceanic spreading, subduction, ophiolite obduction, arc-continent collision, intra-arc basin formation and strike-slip faulting. It can be divided into two tectono-stratigraphic blocks, namely; the Palawan–Mindoro Continental Block (PCB) and the Philippine Mobile Belt (PMB). The PCB was originally a part of the Asian mainland that was rifted away during the Mesozoic and drifted in the course of the opening of the South China Sea (SCS) during Late Paleogene. On the other hand, the PMB developed mainly from island arcs and ophiolite terranes that started to form during the Cretaceous. At present, the PMB collides with the PCB in the Visayas in the central-western Philippines. This paper discusses recent updates on Philippine geology and tectonics as contribution to the establishment of the International Geologic Map of Asia at 1:5 M scale (IGMA5000). |
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